Definition that contains natural world
- theory a tentative insight into the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena
- theory a well-substantiated explanation of some aspect of the natural world; an organized system of accepted knowledge that applies in a variety of circumstances to explain a specific set of phenomena
- possibility a tentative insight into the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena
- hypothesis a tentative insight into the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena
- nature study the study of animals and plants in the natural world (usually at an elementary level)